The Vintage SEARS PENSKE Dwell Tachometer 21013 is a rare and collectible tool for analyzing and measuring RPM and dwell in motorcycles, passenger vehicles, and heavy-duty/commercial vehicles. Made in the United States by Penske, this analog display dwell tachometer comes with a set of clamps for easy installation. The vintage design and owner's manual add to its charm, making it a unique and sought-after item for automotive tool enthusiasts. May have never been used, looks perfect.